#7B7643

CSS

:root {
  --tree-hugger: #7b7643;
  --tree-hugger-rgb: 123 118 67;
  --tree-hugger-oklch: oklch(0.558 0.071 103.5);
}

.element {
  color: var(--tree-hugger);
  background-color: hsl(55 29% 37%);
  border-color: oklch(0.558 0.071 103.5);
}

Tailwind CSS v4

@theme {
  --color-tree-hugger: #7b7643;
  --color-tree-hugger-50: #f8f7e0;
  --color-tree-hugger-100: #ebeacf;
  --color-tree-hugger-200: #d8d7b4;
  --color-tree-hugger-300: #bcba90;
  --color-tree-hugger-400: #a5a16f;
  --color-tree-hugger-500: #8e894f;
  --color-tree-hugger-600: #787444;
  --color-tree-hugger-700: #605c36;
  --color-tree-hugger-800: #474325;
  --color-tree-hugger-900: #312e19;
  --color-tree-hugger-950: #1d1b0a;
}

SCSS

$tree-hugger: #7b7643;
$tree-hugger-rgb: 123, 118, 67;
$tree-hugger-light: mix(#fff, $tree-hugger, 20%);
$tree-hugger-dark: mix(#000, $tree-hugger, 20%);

.element {
  color: $tree-hugger;
  box-shadow: 0 0 0 2px rgba($tree-hugger, 0.35);
}